Question

How can I combine these two queries into one so I don’t have to repeat the same lines again and again?

if(empty($cat_id))
{
    $sql = "
    SELECT *
    FROM root_category_contacts
    ORDER by cat_order ASC
    ";

    $items_category = $connection->fetch_all($sql);
}
else
{
    $sql = "
    SELECT *
    FROM root_category_contacts
    WHERE root_category_contacts.cat_id != ?
    ORDER by cat_order ASC
    ";

    $items_category = $connection->fetch_all($sql,array($cat_id));
}

I don’t need WHERE clause when I don’t have the cat_id.

Is it feasible?

Answer 1

Test if ? is null or equals cat_id. Something like this:

Edit based on xdazz’s comment. And assuming that cat_id > 0

$sql = "
SELECT *
FROM root_category_contacts
WHERE root_category_contacts.cat_id != ?
ORDER by cat_order ASC"

if(empty($cat_id)) {
    $cat_id = 0;
}

$items_category = $connection->fetch_all($sql,array($cat_id));